2. Materials and Methods. This review was completed using a narrative, non-systematic approach. A range of databases, including PubMed, Medline, Google Scholar, and EBSCO-host, were searched for this review paper (see Figure 1).A representative but non-exclusive list of keywords for these searches included: creatine, creatine supplementation, exercise, performance, ergogenic aid, exercise ...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8228369